Colorado
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Boulder, Jefferson, Denver, Arapahoe, Douglas
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September 29, 2014
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Hail
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$262,989,000.00
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$213,000,000.00
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Part of NCDC's billion-dollar disaster list. Estimated to be the eighth-most costly hailstorm in Colorado history.
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Wyoming
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Campbell, Sheridan, Park, Crook, Big Horn
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Wright, Sundance
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April 25, 1984
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Winter Storm, High Wind
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2
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$281,324,000.00
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$100,000,000.00
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2' to 3' of spring snow fell along with 65 mph winds, causing 15-20' drifts. The storm occurred during spring calving and lambing season, causing the loss of more than 200,000 sheep and cattle. High winds and the weight of snow on structures caused significant economic damage.
"From April 25-27, 1984, the worst late spring blizzard ever to hit Wyoming battered the northern part of the state for three days. The northeast section was the hardest hit as snowfalls of 2 to 3 feet were whipped into 15 to 20 foot drifts by 65 mph winds. A rancher near Wright and one near Sundance died of exposure as they were stranded while hauling hay to their livestock. All of northeast Wyoming was effectively shut down for two days. Major damage occurred to the livestock industry as more than 200,000 sheep and cattle perished in the storm. Some ranchers lost up to 95 percent of their sheep, and up to 50 percent of their cattle. Contributing factors to the very high losses were: a large number of the sheep had recently been shorn; the livestock were well into the spring lambing and calving season; and finally, the storm started as cold rain that changed to wet snow which stuck to everything. In addition, the weight of the record-breaking snow damaged many roofs, and high winds of 50 to 65 mph blew down quite a few structures. Total economic loss was estimated at more than $100 million. The storm is the costliest in Wyoming’s history." - WY Hazard Mitigation Plan 2021-2026
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Colorado
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Boulder
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Salina, Gold Hill
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September 06, 2010
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Wildfire
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$287,331,000.00
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$214,352,000.00
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The Fourmile Canyon Fire started after a month of extremely dry conditions, on a day with unusually strong winds for early September. Most of the 169 homes destroyed were burned on the first day of spread. About 6,500 acres were burned, and the city of Boulder itself was at risk on September 10.
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Wyoming
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Park
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July 01, 1988
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Wildfire, High Wind
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2
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$296,496,000.00
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$120,000,000.00
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In 1988, Yellowstone National Park recorded almost no rain during the summer months. During the later half of summer, several smaller fires were started by lightning. High winds and dry conditions caused the fires to rapidly spread and merge. Before a cold front helped contain the fires, 9,000 firefighters, and 100 engines were mobilized to fight the blazes. Before containment, the complex burned 793,880 acres (36% of the park) and cost $120,000,000 in supression efforts. The fire destroyed 67 buildings along with backcountry and frontcountry infrastructure. The fires had far-reaching ecological impacts which have been the subject of numerous studies.
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Utah
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Kane, Washington
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January 08, 2005
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Flood
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1
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$336,747,000.00
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$225,000,000.00
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After six years of drought, the Virgin River basin experienced heavy rain in October 2004, resulting in minor flooding and saturating the soil heading into the winter. During January 8th - 12th a Pacific storm system produced between 0.7" and 7.7" of rain on soil that was highly saturated, resulting in significant flooding. Damages included 30 homes destroyed and 20 more significantly damaged.
"In 2005, 12 inches of precipitation fell in a 48-hour period over southwest Utah. Record flows of over 6,000 cubic feet per second on the Santa Clara River destroyed over 28 homes adjacent to the river. Homes along the river had been built on river sediments deposited from earlier flooding. When this storm occurred, the sediments that the homes had been built on quickly eroded. The Upper Still Reservoir was also damaged by the flood and had to be drained for repairs to take place. Early estimates from Washington County placed the total damage of the devastating floods that occurred during the second week of January 2005 at roughly $150 to $180 million, with another $100 million possibly needed for river reclamation efforts. The raging waters of the Santa Clara River, and to a lesser extent the Virgin River, reached flows not seen in this part of the country since floods carried away several settlements and settlers during the winter of 1862." - National Weather Service
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Colorado
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Larimer, Logan
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Fort Collins, Sterling
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July 27, 1997
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Flood
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5
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$364,232,000.00
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$200,000,000.00
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Two consecutive days of heavy convective precipitation in and near Fort Collins; on the 28th, over 10" fell in 6 hours in the Spring Creek watershed on the west side of Fort Collins. The resulting flash flood on Spring Creek heavily damaged Colorado State University and residential areas, and caused 5 fatalities. The following day, 13" fell on Pawnee Creek near Sterling, causing damaging flash flooding there.
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Colorado
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Douglas, Elbert, El Paso
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June 11, 2013
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Wildfire
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2
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$367,633,000.00
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$293,000,000.00
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The Black Forest Fire ignited during moderate drought conditions, on a red-flag-warning day where temperatures were in the 90s F and relative humidity was below 10%. It rapidly spread through densely forested suburban neighborhoods, destroying 511 homes in all, and burning over 14,000 acres. The second most destructive wildfire in Colorado history in terms of homes lost, behind the Marshall Fire in 2021.
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Utah
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Salt Lake
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Salt Lake City
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August 11, 1999
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Tornado
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1
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$403,530,000.00
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$230,000,000.00
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During the early afternoon, the most destructive tornado in Utah's history touched down in southwest Salt Lake City. Shortly after touching down the tornado intensified to an F2. It moved northeast, causing widespread damage at Delta Center including the only fatality of the storm at an outdoor retailers' convention tent. The tornado skirted the Capitol Building and ripped out several large trees there and in Memory Grove. Before lifting off, it caused significant damage in the residential area known as The Avenues. The storm resulted in 1 fatality, 80 injuries, 300 buldings and homes damaged, with 34 deemed uninhabitable. The event destroyed 500 trees and damaged 300 more. Additional damages were inflicted on vehicles and infastracture. The storm had an average width of 300 to 600 ft., a path length of 4.5 mi., and was on the ground for 14 minutes.
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Colorado
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El Paso
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Colorado Springs
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July 28, 2016
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Hail
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$429,663,000.00
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$352,800,000.00
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Sixth most damaging hail storm in Colorado history. "This storm was concentrated in the Colorado Springs area and the size of the hail resulted in a very high percentage of claims that were total losses." - The Gazette
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Utah
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Statewide
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January 01, 2002
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Drought
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$519,926,000.00
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$320,000,000.00
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The worst year of a statewide drought from 2000-2004. One of the worst droughts on record in the Upper Colorado River Basin. Low precipitation combined with above-average temperatures reduced available water. The statewide summer Palmer Drought Index was -6.1, the 2nd lowest on record. Dryland farmers reported low yields and a state of agricultural disaster was declared for drought and then grasshopper and Mormon cricket infestations. Costs are from 2002 and 2003 combined.
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